### Donald G. Saari

The mathematical analysis of voting systems, and of aggregation rules in general, shows that they can yield paradoxes as well as preferences. In this article, featured here for Mathematics Awareness Month, the author explains what kind of problems can arise and how they can be mathematically understood.

(pp. 448)

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### Philip J. Davis and David Mumford

April 2008 marks the 100th anniversary of an ICM lecture by Henri Poincaré on the future of mathematics. The authors consider Poincaré's predictions, both general and specific, in the light of the ensuing century.

(pp. 458)

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### Peter Gritzmann and Bernd Sturmfels

Colleagues, students, and others recall the mathematical life of the eminent American mathematician.

(pp. 467)

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